Presser foot for sewing machines



Feb. 2, 1932. c. w. MUELLER PRESSER FOOT FOR SEWING MACHINES OriginalFiled Oct; 15, 1927 Gttorncg Patented Feb. 2, 1932 PATENT OFFICEcHaniLEs w: MUELLER, or'sr. toms, ivrrssonnr, ASSIG-NOR TO-LEWIS rirvIsILnsrrr'roii MACHINE COMPANY, on ST. LoUIs, MIsso n 'n 'conronnrion orMAINE terminates in a stitching head 6.

. PRESSER room FOR snwrne MACHINES Original application filed October15, 1927, Serial No. 226,398. Divided and. this application filed.August 4,

1928. Serial This invention relates to new and useful improvements in apresser foot for sewing machines generally, although the inventlon isparticularly adapted for use in connection with blind stitch sewingmachines.

This application is a division of the application filed by me Oct. 15,1927, Serial No. 226,398 for improvements in blind stltch sewingmachines and now Patent1,7 39,081, Dec. 10, 1929.

The principal object of my invention is to provide means wherebyapresser foot which is rigidly attached at its rear end to the sewingmachine frame may have its working plane adjusted into parallelismWltl'l the working plane of the work support,

With these and other objects in View which will more fully appear, thenature ofv the invention will be more clearly understood by followingthe description, the appended claims, and the'several views illustratedin the accompanying drawings. g

In the accompanying drawings which illustrate one form of my invention:

Fig. 1 is a front elevation showing the application of my invention in ablind stitch sewing machine,

Fig. 2 is a detail sideelevation thereof, Fig. 3 is a detail top planview of Fig. 1, and

Fig. 4 is an enlarged top plan view of the presser foot. 7

Like reference numeralsdesignate corresponding parts throughout theseveral figures of the drawings.

Referring to the accompanying drawings, my invention includes a sewingmachineA having a forwardly extending arm 5'which v Journaled in thisarm is an oscillatory needle shaft 7' which is actuated by the mainshaft 8 journaled in the rear horizontal arm 9. The shaft 7 extendsforwardly beyond the front end of the arm 5 and fixed thereto is aneedle arm 10 to whicha needle 11 is attached by a a.rm .5.

through openlngs inthe flanges and are e11 615151" Coopefating iththenames form aline of single thread chain stitches is a looper, :13 whichis fixed to a looper bar 14 pivotally supported as at 15 on the arm 5'and actuated .from the main shaft 8 by suit able connections. 1 a i i Astationary. presser foot 16 is disposed directly below the needle 11 andalso below the looper 13. Thispresser footv is detachably connected tothe arm 5 through the medium ofa fork 17 which isformed on the rear endof the foot and which cooperates with a clamping nntv 18. Formed in thepresser foot is a' slot, 19 having its longitudinal axisextending-parallel to theneedle rock shaft 7 and ina plane at rightangles to the path of oscillatio'n of the needle 11. Inorder toadjust'the working position of theplane of the foot, I have'providedsaid foot at opposite sides thereof with upwardly extending posts 20, 20havingtheir upper ends'provided with flanges 21, 21 which ex.- tend'over bearing lugs 22, 22 formed on the Adjusting screws 23, 23 passgaged inthreaded openings formed in the lugs. By means of theseadjusting screws 23, the plane of the presser foot may be readilyadjusted. Clamp screws 2 1,24 ex- ;tend through vertical slots in theposts 20,20

and have threaded engagement with the lugs 22, 22. By releasingbothclamping screws 24, the presser'foot may-be forced downwardly fromits rear or attaching'end upon the turning of the adjusting screws 23 ina clock-wise direction, to thereby adjust the plane of the foot relativeto the horizontal. If it is desired to. elevate the foot, the

clamping screws 241 and the adjusting screws 23 are turned inan-ianti-clock-wise direc tion, the foot swings upwardly about itsattaehingend by hand pressure exerted under the front end of the foot,and the clamping screws 24- andadjusting screws 23 are then returned ortightened,

A normally horizontal work support 25 is pivotally supported at itsfront end and is yieldably held in said horizontal position, as shownand described in my co-pending application Serial No. 226,398, filedOctober 15,

main frame and at a point in front of the foot, it will be readilyunderstood that with materials of difierent thicknesses, the workingplane of the work support Wlll vary 1n angular relation to the plane ofthe presser foot bottom.

By reason of the adjusting screws 23 and clamping screws 2%, the workingplane of the foot may be adjusted into parallelism with the inclinedworking plane of the work sup port.

A work'presenting mechanism which I have indicated as a whole by thereference nu meral B, is disposed below the presser foot 16 andcooperates therewith. This work presenting mechanism includes anoscillatory feed disc 27 and a work clamp 28 which are specificallydescribed and claimed in my copending application referred to above.

It is of course to be understood that the details of structure andarrangements of parts may bevariously changed and modified withoutdeparting from the spirit and scope of my invention.

I claim:

1. In a sewing machine, the combination with a frame including astitching head, of a presser foot rigidly secured at its rear end onlyto said head, a normally horizontal work support pivoted on the base infront of the foot and yieldably supported in its normal position, andadjustable supporting means located in frontof the securing means andconnecting the foot and head to fixedly vary the working plane of thefoot.

2. In a sewing machine, the combination with a frame including astitching head, of a presser foot rigidly secured at its rear end onlyto said head. and ustable supporting means located in front of thesecuring means and connecting the foot and head to fixedly vary theworking plane of the foot, said supporting means including a post fixedto and extending upwardly from the foot, and an adjusting screw mountedon the upper end of the post for engagement with the head.

3. In a sewing machine, the combination with a frame including astitching head, of a presser foot rigidly secured at its rear end onlyto said head, and adjustable supporting means located in front of thesecuring means and connecting the foot and head to fixedly signature.

CHARLES W. MUELLER.

